* Average scale score is significantly different from 2005.
¹ Some of the TUDA districts include a few public schools located outside of large central cities as defined by the Census Bureau (population of 250,000 or more within metropolitan areas). These schools are included in the category of "large central city" for all years, but were not included in previously published results. As a result, some numbers reported on this website may differ slightly from those reported earlier on the web and in print.
² The district did not participate either in 2002 or 2003.
NOTE: Significance tests were performed using unrounded numbers.
DATA: View complete data with standard errors for scale scores in districts and the nation or in large central cities.